Drill guide and rest



(N0 Medial.)

L. F. LONGMORB.

DRILL GUIDE AND REST.

No. 284,449. Patented Sept. 4, 1883.

4 INVENTOR: 41%;!"

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UNITED STATES PATENT HOFFICE Lnwis F. LONGMORE, on LOWELL,MASSACHUSETTS.

DRILL GUIDE AND REST.

SPECIFICATION forming part of Letters Patent No. 284,449, datedSeptember 4, 1883.

\ Application filed May 19,1883. (No aeael.)

To all whontit may concern:

Be it known that I, LEwIs F.'LONGMORE, of

Lowell, Middlesex county, Massachusetts, have invented a new andImproved Drill Guide, Rest, and Holder of which the following is a full,clear, and exact description.

My invention consists of an adjustable guide rest and holder for holdingdrills between the tailcenter and face-plate, head-stock, or chuck IQ ofa lathe to bore pieces revolving in the lathe,

the drill being held by the said holder, which is also a guide by whichto enable the drill to center itself, or, in other words, to be centeredby the action of the work; The adjustable contrivance for the device isdesigned to adapt it for holding drills of all sizes, and enabling it totake the place of the numerous slot-rests of diflerentsizes now used forthe purpose, all as hereinafter fully described.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts in both figures.

Figure 1 is a perspective view of my improved guide rest and holder witha drill in position, and a sectional elevation of the toolrest holder ofa lathe, to which the said guiderest is fitted Fig. 2 is 'a perspectiveview of apart of the device adapted to be mounted in the tool-post of anengine-lathe.

I make a strong stock, a, of malleable iron or of forged metal, with ashank, b, at one end to support it vertically in the tool-rest socketc,or with a straight or any suitable shank, b,

5 to connect with the tool-post d. The other end has a clamp-jaw, e,projecting back over the upper surface of the stock and a suitabledistance above it, between which jaw and said stock is avertically-adjustable bar, f, hinged 0 at g and projecting under saidjaw, and having guide-lugs h fitted to the vertical part i of "the stockfor controlling the movable end of the bar. Under the outer end of saidbar and beyond the pivotg there is a spring, j, fitted between the shankof the stock and the end of 5' the bar, which presses the other end ofsaid bar down on the adjusting-screw k, to hold bar f firmly thereon andprevent it from chattering. The adjusting-screw k is preferably fittedin a nut, Z, which is inserted in a slot of the stock to enableit to berefitted and renewed when too much worn, and it allows the, screw tohave some play in case it may be preferred to fit the upper end of thescrew in a socket in the lower side of bar f. A checknut, m,is fitted onthe screw to secure it firmly when set in the required position. Thespring i j is fitted in sockets in the stock a and the bar f forsubstantial controlof it. p

The drill n is to be held between jaw e and barf, the same as in thecommon slot-rest, when feeding the drill by the tail-center o to bore apiece revolving on the face-plate or in a chuck; and it will be seenthat, by the adjustable contrivance of barf, drills of any size may beheld, 6 so that one tool will serve for all.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. The combination of the adjustable bar f with thestock a, having jaw e, and being provided with a shank adapted to besupported in the rest-socket or tool-post of a lathe, sub stantially asdescribed.

2. The combination of the adjustable barf and adjustingscrew k with thestock a, having ajaw, e, and a shank, b 1), adapted to be-- supported inthe tool-post or tool-rest socket of alathe, substantially as described.

3. The combination, with the stock a, havf ing jaw e, and a shankadapted to connect with the tool-post of a lathe, of the adjustablebarf, pivoted to stock a, spring j, and the adj usting-screw k,substantially as described.

Lnwis FRENCH LONGMORE.

Witnesses:

CHAS. W. MOREY, GEo. H. STEVENS.

